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hping

hping is a free packet generator and analyzer for the TCP/IP protocol. Hping is one of the de-facto tools for security auditing and testing of firewalls and networks, and was used to exploit the Idle Scan scanning technique now implemented in the Nmap port scanner. The new version of hping, hping3, is scriptable using the Tcl language and implements an engine for string based, human readable description of TCP/IP packets, so that the programmer can write scripts related to low level TCP/IP packet manipulation and analysis in a very short time. Like most tools used in computer security, hping is useful to security experts, but there are a lot of applications related to network testing and system administration.
since version 3, that's now in alpha stage, hping is trying to not be just a little tool but to become a framework for scripting related to TCP/IP testing and security. hping3 continues to be command-line compatible with hping2, but integrates two main new things: the first is an engine called APD that is able to translate simple packet descriptions in the form of strings into a packet ready to be sent, and the reverse (generate the representation from a real packet). The second is the Tcl scripting language. So you can imagine hping3 as a scriptable TCP/IP stack
Example Script:

hping3 should be used to...
• Write real applications related to TCP/IP testing and security.
• Automated firewalling tests. • Proof of concept exploits.
• Networking and security research when there is the need to emulate complex TCP/IP behaviour.
• Prototype IDS systems.
• Simple to use networking utilities with Tk interface.
• All the usage of hping2

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Steps
1:download the page.
2:open fc4.js in your favourite editor and add following lines in it or just replace it with vode given below.
3:then open the download html file in browser and fill the form with your email and a garbage value string.
4:thats it? it will show you the real security string??
yeah but ...theirs another challenge waiting for you ... :D

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